Chuck for planing-machines



UNITED A'STATES PATENT OEEICE.

BENJAMINE. STEPHENS, OE BROOKLYN, NEw YORK.

CHUCK FOR PLANlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 235,469, dated December 14, 1880.

Application led June 15, 1878.

To all whom it may concern:

Beit known that I, BENJAMIN F. STEPHENS, ot' Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Chucks for Planing-Machines, of which the following is a specification.

, be planed in the required manner and adjusted for taper or irregular work.

I make use ofa circular base that is adapted to be attached to the bed of the planing-machine and guided in its position .by ribs entering one of the longitudinal grooves inthe bed.

Upon this base there is a swivel-rest for the clamping-vise, and upon the jawof such vise there is a taper attachment for holding tapering or irregular articles, and upon the circular base there are divisions marking the degrees or parts of a circle, so that the vise-stock and vise can be placed atany desired angle to the line of motion ot' the bed.

In the drawings, Figure I is a perspective view of the planer-visea-nd its base,and Fig. 2 is a vertical section-.ofthe-same.

The base a is by preference circular. It has holes vb through it for the reception ot' bolts that attach it to the bed of a planing-machine,

and there are also by preference downwardly-- projecting ribs c, that `tit the longitudinal groove of the planing-machine bed. There is a circular bearing, a', upon the base a for the stock d of the planer-vise.

A.` central pivot, e, passes into a hole in the base a, and there is a-'double undercut circular groove inthe base a., that receives the heads and lower parts of the bolts j', that pass up through the vi e -stock d, and are` provided `with nuts for clamping the vise-stock firmly in place when adj usted.

ltv is to 4be understood; that the double undercut groove is similar to the grooves in the beds of planing-machines,only circular, the lower part of the groove being the widest, so as to receive the bolt-heads, and the upper part corresponding in width to the diameter of the body of the bolts. The bolts are entered up from below the base a through a hole that is large enough for the bolt-heads to pass through in reaching the said groove.

Around the circular portion of the base a there are Vmarks indicating degrees or other divisionslof the circle, as at s, and at o there is an index-point-.on the stock d, so that the stock. can be placed and held at the desired position relatively to the base.

Upon the stock d is the stationary jaw l, that is provided with a concave segmental face that receives the taper-attachment jaw m, similar to that inthe Patent No. 125,625, so as to be adapted to receiving irregular or tapering articles. The jaw 'n is upon a slide, t, that moves back and forth upon the guideways u upon the stock d, and is actuated by a screw, o, so as to clamp and hold firmly any article placed between the jaws.

If desired, the jaws l m of the taper attach ment may have divisions marked upon the adjacent edges, so as to indicate 0, or Zero, when the jaw-faces are parallel, and also the angles of inclination, one way or the other, as the jaw m slides endwise to accommodate the article grasped;

l am aware that chucks and vises have been made with a base and a bed with jaws. They, however, were not adapted to holding tapering articles and determining the angle between one face that is being planed and another.

I am also aware that taper attachments for vises are old. In my improvement, by making the base and stock circular, and marking divisions in degrees, and having one jaw plain and the other with a taper attachment, I am enabled to hold wedgeshaped articles and plane one vertical face corresponding to the plain jaw, and then turn the vise-stock the required number of degrees for planing the other face, thus accomplishing what has not 'before been donc.

It is to be understood that the part of the article that is being planed projects above the i ticles while being planed, substantially as vise-jaws. specified. io

I claim as my invention- Signed by me this 13th day of June, A. D. The combination, with the circular vise- 1878.

5 stock and base having divisiuns, of the jaws ln, and the taper attachment m upon one jaw, i Witnesses: Substantially as set forth, whereby the vise is I GEO. T. PINCKNEY, adapted t0 hold tapering and irregular ar- BENJ. F. STEPHENS.

CHAs. H. SMITH. 

